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View Full Version : Need help on Electric field problem


nns91
Sep21-09, 07:44 PM
1. The problem statement, all variables and given/known data

An electron (charge -e, mass m) and a positron (charge +e, mass m) revolve around their common center of mass under the influence of their attractive coulomb force. Find the speed of each particle v in terms of e, m, k and their separation r ?

2. Relevant equations

F= kq1q2/ r^2

3. The attempt at a solution

Can you guys give me a hint on this one ? Should I find the angular speed then ?

tiny-tim
Sep22-09, 10:48 AM
Hi nns91! :smile:

Hint: use centripetal acceleration :wink: